松南红90区块扶余油层油藏压裂地质模型建立及应用

发布时间：2018-06-10 18:18

本文选题：地质建模 + 扶余油层　；参考：《东北石油大学》2015年硕士论文

【摘要】：论文运用经典层序地层学和高分辨率层序地层学理论,厘定研究区层序地层格架,建立高分辨率层序地层划分方案,划分出等时地层单元。以此为约束,进行油藏评价的地质基础研究,建立包括地层、构造、沉积、储层等方面的地质概念模型;进行油藏地质基础指导的地震储集层预测。结合构造特征、预测的储层砂体展布和试油试采资料,进行油藏特征和油气分布不均一性分析。将三维构造解释的结果、沉积相研究结果、测井参数研究结果作为地质建模的输入,建立研究区精细、准确的三维定量油藏地质模型,识别砂岩及泥岩隔夹层分布范围,进行水平井压裂应用。取得了以下主要认识:1.解释覆盖全区的连井对比剖面8条。对全区储层进行精细划分与对比,将研究区主要目的层段划分为4个砂组、12个小层,各小层厚度平稳变化不大,反映了比较稳定的沉积,2.对工区现有测井资料统一了格式和单位,建立了各层的孔隙度、渗透率、含气饱和度、泥质含量解释模型,更针对性的计算岩石脆性敏感参数。3.在前人研究基础上,将优选的属性与井点砂地比建立关系,以此对储层的平面分布特征进行描述,并结合单井相的研究,刻画出了研究区的沉积微相平面图。4.以三维地质模型为依托,综合分析构造、沉积、储层,研究砂体在平面、垂向上的分布特征,通过与实钻水平井录井数据的对比检验可知,模型精度较高,进行水平井设计及压裂施工,形成一套利用三维模型指导工程措施的新思路,以期能为类似低渗透区块压裂施工提供研究思路。5.地质模型更加的精细刻画砂体的展布,反映不同沉积时期砂体的展布,同时能够准确的把握构造和砂体走势,对于水平井地质设计平面位置的优选指导水平井轨迹在垂向位置上的钻进,提高砂体钻遇率有十分重要的意义。6.地质模型明确砂体与水平井轨迹的相交情况,使得工程技术人员对压裂位置选择,造缝长度、裂缝方位做出预判,同时有效的识别泥岩隔挡层,对采取不同的手段进行压裂地质设计提供良好的支持。
[Abstract]:Based on the classical sequence stratigraphy and the high resolution sequence stratigraphy theory, the sequence stratigraphic framework of the study area is determined, and the high resolution sequence stratigraphic division scheme is established, and the isochronous stratigraphic units are divided. Taking this as a constraint, the geological basic research of reservoir evaluation is carried out, the geological conceptual model including stratigraphic, structural, sedimentary and reservoir is established, and the seismic reservoir prediction guided by reservoir geological foundation is carried out. Combined with the structural characteristics, the distribution of reservoir sand bodies and production test data are predicted, and the reservoir characteristics and oil and gas distribution heterogeneity are analyzed. The results of 3D structural interpretation, sedimentary facies and logging parameters are taken as the input of geological modeling, and a fine and accurate 3D quantitative reservoir geological model is established to identify the distribution range of sandstone and mudstone intercalation. The application of horizontal well fracturing is carried out. I got the following main idea: 1. Interpretation of 8 correlation profiles covering the whole area. According to the fine division and correlation of the reservoir in the whole area, the main target layer in the study area is divided into 4 sand groups and 12 sub-layers, and the thickness of each layer has little stable change, which reflects the relatively stable sedimentation. This paper unifies the format and unit of the existing logging data in the working area, establishes the interpretation model of porosity, permeability, gas saturation and muddy content of each layer, and calculates the sensitive parameter of rock brittleness more pertinently. On the basis of previous studies, the relationship between the property of optimal selection and the ratio of sand to ground at well point is established to describe the characteristics of reservoir plane distribution, and combined with the study of single well facies, the sedimentary microfacies plan map .4of the study area is described. Based on the 3D geological model, this paper synthetically analyzes the structure, deposition and reservoir, studies the distribution characteristics of sand bodies in plane and vertical direction, and shows that the accuracy of the model is high by comparing with the logging data of real horizontal wells. The horizontal well design and fracturing operation are carried out, and a set of new ideas using 3D model to guide the engineering measures are formed, in order to provide research ideas for fracturing operation in similar low permeability blocks. The geological model can more precisely depict the distribution of sand bodies, reflect the distribution of sand bodies in different sedimentary periods, and at the same time accurately grasp the trend of structures and sandbodies. It is of great significance for the horizontal well trajectory to be drilled in vertical position and to improve the drilling rate of sand body. The geological model clarifies the intersection of sand body and horizontal well trajectory, which makes engineers predict fracturing location, fracture length, fracture orientation, and effectively identify mudstone barrier. It provides good support for fracturing geological design by different means.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

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